OK. I am starting my research with PV (solar) inverters/chargers that work offline (meaning no cloud, no internet needed, LAN (local network) is fine) but not off-grid :) I hear good things about the Victron Multiplus series that seem to work that way: https://www.victronenergy.com/inverters-chargers/multiplus-12v-24v-48v-800va-3kva and the Multi-RS Solar that adds MPPT: https://www.victronenergy.com/inverters-chargers/multi-rs-solar@[email protected]
@fedihouse If you know (from experience) about similar devices that charge and feed power without phoning home all the time, feel free to add them to this thread. I will collect them on a page at https://fedihouse.eu
Fedihouse

Fedihouse — upcycling houses with a Fediverse approach. Open Source, Open Hardware, Renewables, Accessibility. Sharing experiences, knowledge, lessons learned and new ideas.

@fedihouse Not very surprised to find out that such inverter/chargers exist in quite a few niches. The marine sector, for example, has a need for such configurations. On-grid when harbouring but offline on the sea. Also: RVs.
@jwildeboer @fedihouse oh I'll be following THIS conversation